The telephone number of telecom fraud should be reported to the public security department.

Telecom fraud is a criminal offence, and the telephone number is a criminal clue, which should be provided to the public security department to file a case.

According to the procedural provisions of public security organs in handling criminal cases

Article 166 A public security organ shall immediately accept a citizen's abduction, report, complaint, report or the criminal suspect's voluntary surrender, inquire about the situation and make a record. After verification, the abductor, informant, accuser, prosecutor and surrenderer shall sign and press their fingerprints. When necessary, audio or video recordings shall be made.

Article 175 After accepting a case, the public security organ shall, after examination, consider that the criminal facts that need to be investigated for criminal responsibility belong to its own jurisdiction, and file a case with the approval of the person in charge of the public security organ at or above the county level; If it is considered that there are no criminal facts, or the criminal facts are obviously minor and need not be investigated for criminal responsibility, or there are other circumstances in which criminal responsibility is not investigated according to law, the case shall not be filed with the approval of the person in charge of the public security organ at or above the county level.

If a complainant decides not to file a case, the public security organ shall make a notice of not filing a case and serve it on the complainant within three days.